Hi I have screensaver turned off but every so often it goes into like screensaver mode it does the blue circle and samsung logo and while its doing this my phone will not respond properly when you try and draw your pattern or do anything the touchscreen is about 5 seconds behind what you do and it takes about 2 mins to go back to normal ive checked all my settings and cant find anything my ohone is useless when its like this HELP please anyone